All Employees: Professional and Business Services: Accounting, Tax Preparation, Bookkeeping, and Payroll Services in Illinois was 55.66473 Thous. of Persons in December of 2025, according to the United States Federal Reserve. Historically, All Employees: Professional and Business Services: Accounting, Tax Preparation, Bookkeeping, and Payroll Services in Illinois reached a record high of 57.55429 in August of 2025 and a record low of 34.35659 in August of 1992. Trading Economics provides the current actual value, an historical data chart and related indicators for All Employees: Professional and Business Services: Accounting, Tax Preparation, Bookkeeping, and Payroll Services in Illinois - last updated from the United States Federal Reserve on April of 2026.